The most authoritative definition of male infertility: According to the World Health Organization (WHO), male infertility is defined as a condition in which a couple has lived together for more than one year without the use of any contraception, and the woman is infertile due to male factors. Male infertility is not a stand-alone disease, but is the result of one or more diseases and/or factors. Assessment of male fertility status: Nearly 90% of couples can conceive naturally within 12 months. It was once thought that male infertility assessment would only be considered after 12 menstrual cycles or 1 year of unprotected sex, or after 6 menstrual cycles or 6 months of unprotected sex in women over 35 years of age, but now the view is that male fertility assessment can be done at any time, depending on the couple’s desire to have a child, and that it is not necessary to try, especially in cases of familial causes or when an abnormality is suspected in one of the couples. A spontaneous pregnancy of more than one year is acceptable for evaluation.